Kinetics of the formation of domain walls in the degenerate optical parametric oscillator

Summary form only given. In a degenerate optical parametric oscillator (DOPO) the non-trivial homogeneous signal amplitude presents a /spl pi/-phase indetermination, giving rise to the formation of walls separating the two /spl pi/-phase domains. The kinetics of the phase separation from an initial 50%-50% mixture of positive and negative domains, is studied with the help of the average domain size, proportional to the inverse of the interface length.